Joint breaker and cathead



July 27, 1943. J, H. SCHREIBER 2,325,429

JOINT BREAKER AND CATHEAD Filed July 16, 1941 Patented uly I 27, 194372,325,429.v I' JOINT BREAKER'AND 'CATHEAD John H. Schreiber,"V St.Louis, Mo. Application July 16, 1941, serial No. 402,661k

` 'is claims. V,(01. :asiiwal Y 1 y"This invention relates t0,jointbreakers and catheads, and is adapted and designed specially foruse in oil elds and `elsewhere inbreaking the joints between pipesections. 1

Objects of the invention are to provide an,

improved joint breaker and cathead having a ro- `tor mounted forconstant rotation when the device is in useandsupporting a relativelymov- .able clutch member or actuator adapted to be moved toiand from anidle or unoperated posi-:- I tion; incombination with another` clutchmem- `ber or shoe ,of novel constructionand attached ,to the usual jerkline of the joint breaker; novel means providing a connection betweensaid shoe {and the jerk line for effectivelyholding the shoe itsunoperated position preparatoryforen- Vgegen/lent and movement by saidiirst ,clutch v*member to wind the Ajerkline on the rotor; op-

tional means for moving said first vclutch member from its idle orunoperated position to a position in which git'willengage saidshoe orsecond clutch member during constant rotation of ,the rotor; and meansautomatically moving and `disengaging said ,rst clutch memberfrom saidshoe at therrproper time, thereby permitting the i, jerk line to unwinditself or to be unwound from the rotor and tomove4 said shoe unoperatedposition.

Other objects of thislinvention areltoV provide an` improved `jointbreaker and cathead having a relatively long `jerk linestroke; or extentoi movement by` and duringarelatively low or slow to its initial or4jerk line speed of movementlto provide a drum rotative continuously inoneV direction when in eiective operation in combination 'with a shoe yattached to the jerk 1ine,`a device carried'by `and thereby said clutchmemberv and shoe in proper assembled and cooperative relationship.

`Other objects will appear from the following description, referencebeingy made toY ,theanneXed drawing, in which- Fig. l'is an endelevation of my improved `joint breaker and cathead device and showing,particularly the mechanism controlling the actuator or clutch membermounted on the rotor. Fig 2 is an elevation looking toward the righthand side of Fig. 1.

Fig. 3 is a sectional view of` the device trans Yversely of the axis ofthe rotor.

Fig. 4 is a sectional View showing particular lyfthe manner inwhich theelements of the dei vice are held in assembled relationship, and `alsothe'manner Vin which the jerk line is pivotally onnected'with the shoe.Y i

Fig. 5 is a transverse sectional view approximately on the. line 5 5 ofFig. 2.

` Thejpresentinvention is embodied in a joint breaker and catheadgenerically of the type disclosed in my prior application Serial No.338,559,

iiled June 3, 1940, now Patent No. 2,275,271,

' dated March 3, 1942.

The stationary frame or housing I is generally of annular form and isadapted to be secured 'i .rigidly tothe Ydraw-works Vby any appropriateand movable relative'to the drum for engaging and moving the shoe in adirection towindthe jerk line onthe drum, andlmeans forreleasing saiddevice from the shoe after an effective movement of the shoe of 360 ormore .to wind Y the jerk line on the; drum; to provide a removable and,interchangeableinsert providing the proper bore,A diameter and utilizethis insert to Hhold theseveral parts of the unit together; to: providean improveddevice in which the starting speed ot the jerk line isreduced to a mini'- mum and much lower thanv thestarting speed of jerklines in devices now in use; and t0 pro- Avidev aspring device for`initiating the return movement of the jerk lineV to its starting or idleposition after said device hasni-been disengaged from the shoe. i

Another object of the invention is to provide a joint breaker andcathead device composed of a minimum of units or elements including a.relatively.V movable actuator or clutch member mounted on the rotor, anda shoe or additional f clutch' member attached to the usual jerk line,

and means for `detachably holding said 4elements attaching means. Anopening 2 is provided through one side of the housing, and the jerk line3 extends lthrough said opening.

The rotor or-drum upon which the jerkline 3 is toY b e wound comprises'two complementary members each including an annular portion 4,

- an outwardly extended radial portion 5, and an inwardly extendedflange E integral with each of said radial portions. The twoannularportions 4` of the drum are in abutting contact. The drum is`rotative within the frame I and is mounted vupon and attached to a hubt` `adapted to be secured to the rotary draw-works shaft. Bolts l extendthrough formations on the hub 6 and throughthe annular port-ions I ofthe drum and through an annular wall element 8, and are provided on atleast one end with removable and replaceable nuts S'whereby the partsengaged by i vsaid bolts 'I are clamped together in rigid relaguideforsaid Shoe. shoeare integrally connected at one end and tionship forrotation by the draw-works shaft.

The end of the jerk line 3 within the housing is rigidly attached to theabutment socket I0 the outer end of which abuts against the innersurface of the frame IV at the openingV 2 in the idleY or unoperatedposition of the jerk line and socket, The socket I0 also functions as alink and extends between the side portions II of a frame-like shoe orfrunner mounted within the `annular space I2 provided by the parts 4, 5andV 6 of the'rotary drum. Said parts constitutefa The side portions ofthe held inspaced relationship` by a clutch portion I3 and, at adistance therefrom, are also integrally connected by a cross ,portionVle?. The abutment socket I@ extends between the side portions@ :II-ofvthefshoe and' y'between the connectingporti'ons I3. and lli thereof,Vand is..piv otally connected to said side portions by a pin I5. yIn theidle or unoperated position of the jerk line, the socket Ill abutsagainst the frame I at the jerk line 3, is held away from the frame ofthe cathead by a spring 29, or otherwise. When the'arm 28 is held awayfrom the frame I by the spring 29 or otherwise, the cam 2'I`is beyondand 5-outofthe'path of movementof "the roller I9.

' .X/Vhentherarms isrnoved inwardly. adjacent to the 'frame I of thecathead, the cam 2'! is thereby rrnoved into position to be engaged bythe roller I9 and to `operate the rocker arm I'I to turn the the sidesof the opening 2 andwho'ldsr -the"-shoef10=ahtrratdr fl :'Jfto itsinitial or unoperated position substantially free from pressureagainstffor frictional engagement with the rotor by the jerk line. Thisenables the rotor torotatefreely-without affecting the shoe so that theshoemayfrest v mand to; dieengag'e said actuator I9 from the part Y I3of the shoe and thereby leave the shoe free f-toz-'bem'ovedifrom itsoperated position (Fig. 5) 13o..its,unoperated position (Fig. 3) by theun- .or be supported in its idle er unoperated posi- 1`5 winding of thejerk line 3 from the drum. The

i tion` vwithout *objectionable* inte'rference'1 b-yfthe rotor. Y

f- An actuator orclutchfmemberl E-is carried by 'and'rnovablerrelatiyeto ithe' rotor from iadto an unoperated position. In its-unoperatedJ-posi-EQZ Y*member "I 6 is "inrcontinuousjarcuate;alinem'eht `@with the -`periphery"of-"-tl'1atr portion lof lt-he'rotorunoperated position to eiectivepositiongthe `adfvance-edge'thereof''pro-jectsi"into the `space I2 and beyondthe'pe'ripherybfLthe'parts #of the rotorfar: enough=tofengage'the'clut'chs portion I 3 'l 'thespace I 2 fronttheunoperated`positionshown in Fig: 3 tothe ultimate operated positio11`sl-1own inFig. 5, and therebyrwindlthejerk -li-ne"on""tl:1e Y rotaiydrum,yasishown.

40 .funoper'ateclrpo'sitionisl indNl-iiclithe 'cams 24u and "21 to holdsaid actuatorfyieldinglyririthe twoA positions "towhielifitrnaybeturned.This is to say "'l'that'whenthe detentilris'engaged/in one of the'-recesses' 2 l jthe actuator "l l -will 1"be held 'in its *sofi-,heactuatoril 63 When the nuts Sareiremoved, f-thef-hub zxmaybe movedfoutwardly and 'detached ironrthe. assembly; leaying'the 'partythat are'^engagedby theifbolts 'Ifreeffor detaehmenttfrom ffiever 122 may beheid in mention-t5 suppe-maneesfrfhother-'Tn'istutherebyzoperatedItoiturn thefactuator `I9V fai'rom its.'-uifidperatedY positiorii-C'Fig; 3)' to itsf'ffecthief-:orf operatedpositi (Figi 5) 'in which latter :x-po'sition saidf'aetuator .fillengage the-part T13-fof E Whichthe .camzfw-"ilb notlbevengaged bythe 60during .Otoh. of. ,thefdmm @the maker.. arm 65* 'the actuator-"161mm itsunoperated-position"'(1ig.

"3) to its operated positioni-llig'f- 5) Irritspperated' Lposition-*thelactuator "I6"wi1l. engage" the Ypart I3 of the shoe and move .the'ishoealong u with'f'therotor yand thereby windthe jerk line on -1 Movement'o'the jerk line.; 3 in'this manner engages `-t-herlolock '-30 against'the arm; 28..and f moves said armwin a direction and to a positioneto@place kthepam 1lirr' position .to be engagedby to a position to engagethe shoe Y AA2,325,429

caml 21, the actuator I6 is thereby turned about vits axis and promptlydisengaged from the part I3 of the shoe, leaving the jerk line 3 free'tobe `moved in adirection unwinding the same from 1 the drum'and movingthe shoe to its initialv or 'unoperated-'positiom as shown in Fig. 3. Inthe unoperated position of the shoe,4 the abutment socket -Ill engagesagainst the stationary frameA l and thereby supports the shoesubstantially out of frictional engagement with the rotor. The

1, cams 24 and 21 are automatically moved out'oiv the paths of movementof therollers I8` and `Iii,

` respectively, by the spring 25 or'other'wise, be-

fore or during unwinding ofthe jerk line from athe drum. This leaves theparts in position forV another operation when the cam 24 Vis moved byoperation of the lever 22 to turn the actuator I6 `In my improved jointbreaker and cathead, the

lshoe that is attached to the jerk line3 is moved at least and may bemoved more than'360 about lthe axis of the drum before-the actuator orclutch member I6 is disengaged froml the shoe by vthe cam 2l. Thisprovides a relatively long jerk line stroke or` movement which can beefected'byv a relatively slow jerk line Speed ofrnovement. As shown inFig. 1, the block 3D is secured'to the jerk line 3 in an adjustment topermit the minimum extent of movement of the jerk line by the rotarydrum and its associated parts.' This minimum movement is in excess of369. by the disn tance `from the .line 32 to the line 33 at theperiphery of the drum. This movement of the shoe more than 360 aroundthe axis of the drum' isfdan important and. distinguishing feature ofthe present invention.

'rotary drum having a circumferential space, and

a jerk line adapted to be` wound on'said drum within said space; aY shoemounted in said space,

an element attached to said jerk line and` pivoted to said shoe forswinging movements from and to a position in-which said element extendsVoutwardly beyond the periphery of said drum,`

means cooperating with said element preventing substantial pressure ofsaid shoe against said drum by said Yjerk line in said last namedposition of `said element, an actuator supported by said drum formovement relative thereto into a position for engaging and positivelymoving'said shoe and thereby said element to wind said jerk line on saiddrum, and devices for moving said actuator to and from said position. 'jj 2. Mechanism of the character described comprising a rotary drum, ajerk line adapted to be wound on said drum, a shoe Inounted'adjacent tothe peripheryY of said drum, an element attached to said jerk line andpivotally connected with said shoe7 a device carried by and movablerelative to said drum for engaging and moving said shoe along with thedrum in adirectionY to wind said jerk line on said drum, amembersupported adjacent to said drum for movement to a position to movesaid device relative to said drum to eiect a driving engagement betweensaid device and said shoe, and means operated by said fordsengaging saiddevice'from said shoe.v f

3. Mechanism of the character described comj prising a rotary drum, ajerk line adapted to be Wound on said drum, a shoe mounted `adjacent vtothe'periphe'ry of said drum, an element pivotally connecting said jerkYline with said shoe, an actuatonsupported by fsaiddrum formovement-relative thereto into a position for engaging -and positivelymoving said sho'e along with the drum to wind saidjerk line onA said'drum during rotationofthelatter, a manually'operative device for moving'said actuator into said position for 'engaging' said shoe, and meansoperatedblr said jerk line fordisengaging said actuator from said shoe.i

`4. Mechanism of the character described comprising a lrotary drum,ajerk line vadapted to be wound on said drum, a shoe located adjacent tothe periphery of said drum, a` device pivotally connectingV` said jerkline `with said shoe and 1 holding said shoe free from pressure by said'jerk line against said drum in the uncperated position of said-shoe,`an actuator vmounted insaid drum and Ymovable relativeY thereto toengage and v disengage said shoe, a manuali device adjustable in aposition to move said actuator to a position to engage and move saidshoe along with the drum during rotation of said drum, and a device 301attached to said jerk line and operated thereby f for disengaging saidactuator from said shoe.

5. Mechanism of the character described comprising a rotary drum havinga circumferential space, a jerk line adapted to be wound on said drumwithin said space, a shoe mounted within said space in said drum, anelement pivotally connecting `said jerk line withv said shoe andVholding saidshoe substantially free from pressure by said-jerk lineagainst said drum in the unoperated position of saidshoe, an actuatorsupported by said drum for movement relative theretointo a position forlengaging and positively moving said shoe to wind said jerk line on Ysaid drum, a manual operative device for movingvsad actuator' to saidposition, and means 4operated by lsaid jerk line for disengagingsaidactuator-from said shoe. i

6.111' a device of-the character described, a

drum omprisingalhub adapted to be secured to a rotary shaft, a wallelement, two comple- `mentary peripheral portions mounted on said huband forming a circumferential space, detachable means engaging saidY huband said Wall and alsof-'engaging said two peripheral portions andholdingall of said partsV in rigid relationship,` a Yshoe lmounted insaid space, a jerk line pivotally connected and an actuator movablerelative with said shoe,

mounted in said drum and Vthereto to engage and` move saidshoe alongwith tary peripheralportions mounted on saidhub and forming acircumferential space, detachable means Vengaging said hub and said walland also engaging said two peripheral portions and holding all of saidparts in rigid relationship, a shoe mounted in said spacaa jerk linepivotaliy connected with saidshoe, an actuator mounted in said drum andmovable relative thereto 'to engage and move said shoe along with saiddrum and thereby wind said jerk line on said drum within said space, andmeans operated by said A j erk` line "during Y movement thereof bysaid-shoe

